How is the Test Performed?

Blood is drawn from a vein. The vein used is usually from the inside of the elbow or the back of the hand. The site is first cleaned with germ-killing medicine (antiseptic). The health care provider wraps an elastic band around the upper arm to apply pressure to the area and make the vein swell with blood.

Next, the health care provider gently inserts a needle into the vein. The blood collects into an airtight vial or tube attached to the needle. The elastic band is removed from your arm.

Once the blood has been collected, the needle is removed. The puncture site is covered with an adhesive bandage to stop any bleeding.

Preparation for the Test

No special preparation is necessary.

How will the Test Feel?

When the needle is inserted to draw blood, some people feel moderate pain. Others feel only a prick or stinging sensation. Afterward, there may be some throbbing.

Why is the Test Performed?

HCG appears in the blood and urine of pregnant women as early as 10 days after conception. Quantitative HCG measurement helps determine the exact age of the fetus. It can also diagnose abnormal preqnancies, such as ectopic pregnancies, molar pregnancies, and possible miscarriages. It is also used as part of a screening test for Down syndrome.

This test is also done to diagnose abnormal conditions not related to pregnancy that can raise HCG level.

Normal Results for HCG blood test - quantitative

HCG level rises rapidly during the first trimester of pregnancy and then slightly declines.

HCG blood test - quantitative Risks

There is very little risk in having your blood taken. Veins and arteries vary in size from one patient to another and from one side of the body to the other. Taking blood from some people may be more difficult than from others.

Drugs.com provides accurate and independent information on more than 24,000 prescription drugs, over-the-counter medicines and natural products. This material is provided for educational purposes only and is not intended for medical advice, diagnosis or treatment.